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Finding the Fourth Proportional to 21,405.22, 32,111.04 and 7,368.88

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Solution

The fourth proportional to 21,405.22, 32,111.04 and 7,368.88 is: 11,054.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.22 : 32,111.04 = 7,368.88 : x
  2. Step 2: Convert to fraction form
    21,405.22/32,111.04 = 7,368.88/x
  3. Step 3: Cross multiply
    21,405.22x = 32,111.04 × 7,368.88
  4. Step 4: Simplify right side
    21,405.22x = 236,622,400.44
  5. Step 5: Solve for x
    x = 236,622,400.44/21,405.22
  6. Step 6: Final answer
    x = 11,054.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.